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Surface properties of tannin-impregnated and varnished beech wood after exposure to accelerated weathering / Mesut Yalcin in COLORATION TECHNOLOGY, Vol. 133, N° 4 (08/2017)
[article]
Titre : Surface properties of tannin-impregnated and varnished beech wood after exposure to accelerated weathering Type de document : texte imprimé Auteurs : Mesut Yalcin, Auteur ; Huseyin Pelit, Auteur ; Caglar Akcay, Auteur ; Nevzat Cakicier, Auteur Année de publication : 2017 Article en page(s) : p. 334-340 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse des données
Bois -- Effets du climat
Bois -- Vernis
Colorimétrie
Décoloration
Dureté (matériaux)
Essais accélérés (technologie)
Evaluation
Hêtre
Laine
Matériaux -- Imprégnation
Résistance à l'abrasion
Solutions aqueuses (chimie)
Tanins végétauxIndex. décimale : 667.3 Teinture et impression des tissus Résumé : The aim of this study was to determine selected surface properties of varnished beech wood impregnated with natural extracts after exposure to accelerated weathering. Beech wood samples were impregnated with aqueous solutions of 5 and 10% mimosa (Acacia mollissima) and quebracho (Shinopsis lorentzii) tannins. After weathering, colour changes (?L*, ?a*, ?b*, and ?E*) in addition to scratch resistance and surface hardness values were calculated and evaluated. As a result of the weathering process, greater colour changes (?E*) were detected in the beech wood samples impregnated with tannins compared with the unimpregnated control samples. The least colour change occurred in the Tanalith-E-impregnated samples. Total colour change was adversely affected with tannin impregnation after the weathering processes. In terms of surface hardness and scratch resistance, the highest values were observed in the mimosa-solution-impregnated and control samples. Furthermore, it was found that scratch resistance and hardness values tended to increase during the first period of weathering and decreased thereafter. Regarding surface properties, the best results were obtained when polyurethane varnish was employed compared with the other varnish types. Note de contenu : - EXPERIMENTAL : Wool samples, impregnation, coating, and accelerated weathering - Scratch resistance - Surface hardness - Colour measurements - Data analysis
- RESULTS AND DISCUSSION : Colour changes - Scratch resistance - Surface hardnessDOI : 10.1111/cote.12287 En ligne : https://drive.google.com/file/d/17M6JGQk8pc23daH_js4uXRK1Ti4ON6FR/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28887
in COLORATION TECHNOLOGY > Vol. 133, N° 4 (08/2017) . - p. 334-340[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 19175 - Périodique Bibliothèque principale Documentaires Disponible Sustainable, low-emissions, high-performance polyols for wood floor coatings / Gary Spilman in COATINGS TECH, Vol. 15, N° 10 (10/2018)
[article]
Titre : Sustainable, low-emissions, high-performance polyols for wood floor coatings Type de document : texte imprimé Auteurs : Gary Spilman, Auteur ; Scott Moore, Auteur ; Simone J. Marshall, Auteur Année de publication : 2018 Article en page(s) : p. 34-43 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Bois -- Vernis
Brillance (optique) -- Mesure
Dureté (matériaux)
Formulation (Génie chimique)
Isocyanates
Polyols
Polyuréthanes
Résistance à l'abrasion
Résistance aux taches
Résistance chimique
Vernis -- Additifs
Vernis bi-composantIndex. décimale : 667.9 Revêtements et enduits Résumé : The industrial wood coatings space is undergoing some challenges and changes while continuing to grow. The development of sustainable, low-emissions, high-performance wood floor coating technologies continues to be of high interest to the coatings industry. Sustainable content in these coatings contributes to an improved environmental footprint, while low-emission compositions improve the indoor air quality and thereby the health and well-being of building and home occupants desiring to re-occupy these structures as soon as possible. Biorenewablecontent polyols that incorporate low volatile organic content (VOC) (<150 g/L) technology to yield two-component (2K) polyurethane wood floor coatings that have excellent stain and chemical resistance, excellent adhesion to both bare and prefinished floors, good abrasion resistance, low odor, and excellent gloss have been developed. The new coating properties may be readily tailored to meet the individual needs of different floor coating jobs by simply adjusting the isocyanate index or isocyanate type. This study compared a new fully formulated, 150 g/L coating based on this sustainable resin technology and demonstrated properties consistent with being the best overall protective coating for wood at the most economical usage (matching or better finish is achieved with only two coats vs the commercial products needing four or five coats over both original and refinished wood flooring) and lowest VOC in the test group. Initial performance from converting the new floor-coating products into waterborne systems was also investigated. Note de contenu : - Table 1 : Isocyanate materials used
- Table 2 : Formulation additives
- Table 3 : Adhesion data
- Table 4 : Chemical resistance (MFMA specification)
- Table 5 : Hardness data
- Table 6 : Isocyanate blending results
- Table 7 : Catalyst ladder at two index levels for IPDI trimer
- Table 8 : Final 2K coating formulation taber test data
- Table 9 : Benchmark samples
- Table 10 : Final film properties of RMG 2K SB formulated 150 g/L coating vs MFMA specification
- Fig. 1 : König hardness results of commercial vs developmental samples
- Fig. 2 : a) Pencil hardness and b) adhesion results of commercial vs developmental samples
- Fig. 3 : Taber abrasion results at 100 and 500 cycles, grams weight loss
- Fig. 4 : Impact results
- Fig. 5 : Gloss reading readings for various products tested ve RMG 2K SB
- Fig. 6 : Gloss and distinctness of image from the developmental 2K solventborne coating over scuffed UV-cured OEM floor finish on maple
- Appendix : Final wood coating formulation for 75% we solids at 150 g/L VOCEn ligne : https://drive.google.com/file/d/1X210OPR2aKp7V5EM5u7S47PvbF1lJjQB/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=31828
in COATINGS TECH > Vol. 15, N° 10 (10/2018) . - p. 34-43[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 20636 - Périodique Bibliothèque principale Documentaires Disponible The best of two worlds / Tobias Unkelhaüßer in EUROPEAN COATINGS JOURNAL (ECJ), N° 7-8 (07-08/2014)
[article]
Titre : The best of two worlds : Silane-urethane hybrid crosslinkers create scratch-resistant clearcoats Type de document : texte imprimé Auteurs : Tobias Unkelhaüßer, Auteur ; Markus Hallack, Auteur ; Hans Görlitzer, Auteur ; Rainer Lomölder, Auteur Année de publication : 2014 Article en page(s) : p. 21-25 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Vernis
Fluor
Matières plastiques -- Vernis
Polymères à silane modifié
Polyuréthanes
Résistance à l'abrasion
Réticulants
Vernis bi-composantIndex. décimale : 667.9 Revêtements et enduits Résumé : A range of silane-urethane hybrid crosslinkers has been designed to generate multifunctional, scratch resistant coatings usable on a variety of substrates. Addition of mie such product to a 2K polyurethane automotive clearcoat greatly increased scratch resistance. An ambient-cure clearcoat applied over wood as well as plastic also showed very high scratch resistance. Note de contenu : - Clearcoats need to meet very high requirements
- Crosslinking of silane-urethane systems outlined
- Test procedures summarised
- Scratch resistance shows significant improvement
- Resistance to suntan lotion can also be improvised
- Silane-urethane hybrids for moisture curing systems
- Fluorine incorporation enhances cleanabilityEn ligne : https://drive.google.com/file/d/1YHGmkjpuaBiRGbRmTsHKLFyAqVbAvd5v/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21694
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 7-8 (07-08/2014) . - p. 21-25[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16403 - Périodique Bibliothèque principale Documentaires Disponible The effects of tannins on adhesion strength and surface roughness of varnished wood after accelerated weathering / Mesut Yalcin in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 1 (01/2017)
[article]
Titre : The effects of tannins on adhesion strength and surface roughness of varnished wood after accelerated weathering Type de document : texte imprimé Auteurs : Mesut Yalcin, Auteur ; Hediye Ceylan, Auteur Année de publication : 2017 Article en page(s) : p. 185-193 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Angle de contact
Bois -- Vernis
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Essais accélérés (technologie)
Mimosa et constituants
Polyuréthanes
QuebrachoLe quebracho est un arbre à écorce ligneuse, mesurant 30 mètres de haut, à feuilles tannées et à fleurs tubulées blanches.
Quebracho est l'un des noms communs, en espagnol, d'au moins trois espèces similaires d'arbres originaires du Gran Chaco, en Amérique latine : Schinopsis lorentzii (quebracho colorado santiagueño), de la famille des Anacardiaceae ; Schinopsis balansae (quebracho colorado chaqueño), de la même famille ;
Aspidosperma quebracho-blanco (quebracho blanc), de la famille des Apocynaceae.
Ces trois espèces sont riches en tanin et fournissent un bois très dur, particulièrement résistant. Leur nom provient de l'espagnol quiebrahacha, qui signifie brise-hache.
Rugosité
Tanins
Vernis en phase aqueuseIndex. décimale : 667.9 Revêtements et enduits Résumé : This study evaluated the effect of accelerated weathering on the adhesion strength and surface roughness of beech wood (Fagus orientalis) treated with mimosa and quebracho extracts and coated with polyurethane, water-based, and cellulosic varnishes. Untreated beech wood blocks and beech wood blocks treated with Tanalith-E were used as control samples. Test samples were exposed to accelerated weathering processes of 100 and 300 h. According to the test results, the mean adhesion strength of the wood samples impregnated with mimosa and quebracho tannins decreased by a maximum of 20%, while increases in the mean surface roughness (Ra) were detected. The highest adhesion strength and lowest mean surface roughness were obtained with polyurethane varnish. Moreover, the mean adhesion strength increased with the accelerated weathering up to 100 h and then decreased thereafter. As a result of the weathering process, the mean surface roughness increased and was thus negatively affected. Note de contenu : - MATERIALS AND METHODS : Wood samples and impregnation process - Coating of the wood surfaces - Accelerated weathering tests - Adhesion strength - Surface roughness - Contact angle (CA) measurement - Scanning electron microscopy (SEM) - Statistical analyses
- RESULTS AND DISCUSSION : Retention of wood specimens - Adhesion strength - Surface roughnessDOI : 10.1007/s11998-016-9841-1 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-016-9841-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27800
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 1 (01/2017) . - p. 185-193[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 18674 - Périodique Bibliothèque principale Documentaires Disponible The efficiency of various treatments in protecting wood surfaces against weathering / V. Jirous-Rajkovic in SURFACE COATINGS INTERNATIONAL. PART B : COATINGS TRANSACTIONS, Vol. 87, B1 (02/2004)
[article]
Titre : The efficiency of various treatments in protecting wood surfaces against weathering Type de document : texte imprimé Auteurs : V. Jirous-Rajkovic, Auteur ; D. Radovan, Auteur ; A. Bogner, Auteur Année de publication : 2004 Article en page(s) : p. 15-19 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bois -- Détérioration
Bois -- Revêtements protecteurs
Bois -- Vernis
Bois extérieurs
Essais accélérés (technologie)
Essais d'adhésion
Lasures
Nitrate de fer
Photostabilisants
Résistance aux conditions climatiques
Revêtements organiques
Stabilisant à la lumière de type amine encombrée
Traitement chimiqueIndex. décimale : 667.9 Revêtements et enduits Résumé : Wood exposed to the outdoors undergoes photo-oxidative degradation in a natural weathering process.
The efficacy of various treatments for the protection of wood surfaces from weathering elements (ultraviolet radiation and water) was investigated by using the measurements of the changes in adhesion on fir and oak samples after their exposure to natural climatic conditions and after accelerated weathering.
The most efficacious of the six UV-protective treatments proved to be the treatment of the wood surfaces with a semi-transparent stain, followed by treatments with a transparent wood stain containing two types of photostabilisers. The stabilisation of the wood surfaces by ferric nitrate did not improve the performance of the wood stain used.Note de contenu : - Wood samples
- Chemical treatments
- Coatings
- Accelerated weathering
- Natural weathering
- Adhesion testing
- Table 1 : Sample codes and description of the treatments
- Table 2 : Mean adhesive strength (MPa) and standard deviations of samples after QUV exposure
- Table 3 : Mean adhesive strength (MPa) and standard deviations of samples after natural exposureDOI : 10.1007/BF02699559 En ligne : https://link.springer.com/content/pdf/10.1007/BF02699559.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5477
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Code-barres Cote Support Localisation Section Disponibilité 000392 - Périodique Bibliothèque principale Documentaires Disponible The next step in wood coatings / Markus Hallack in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4601 (10/2014)
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PermalinkWettability and bonding quality of exterior coatings on jabon and sengon wood surfaces / Wayan Darmawan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)
PermalinkPermalinkWood surface modification by in-situ sol-gel deposition of hybrid inorganic-organic thin films / Mandla A. Tshabalala in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 4 (12/2007)
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